<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="">
    <input type="email" placeholder="邮箱" multiple>
    <input type="submit">
</form>
<!--multiple运允许输入多个值，用逗号各隔开-->
</body>
</html>